These heartbreaking Jacob Riis photographs from How the Other Half Lives and elsewhere changed America forever.

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1 of 34A young girl, holding a baby, sits in a doorway next to a garbage can. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 2 of 34An Italian immigrant man smokes a pipe in his makeshift home under the Rivington Street Dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 3 of 34Men stand in an alley known as “Bandit’s Roost.” Circa 1887-1890.Jacob Riis/Wikimedia Commons 4 of 34Street children sleep near a grate for warmth on Mulberry Street. Circa 1890-1895.Jacob Riis/Wikimedia Commons 5 of 34A boy and several men pause from their work inside a sweatshop. 1889.Jacob Riis/Library of Congress/Corbis/VCG via Getty Images 6 of 34Members of the infamous “Short Tail” gang sit under the pier at Jackson Street. Circa 1887-1889.Jacob Riis/Wikimedia Commons 7 of 34"Tramp in Mulberry Street Yard." Circa 1887-1888.Jacob Riis/Wikimedia Commons 8 of 34Two poor child laborers sleep inside the building belonging to the Sun newspaper, for which they worked as newsboys. 1892. Jacob Riis/Wikimedia Commons 9 of 34A squatter in the basement on Ludlow Street where he reportedly stayed for four years. Circa 1887-1890.Jacob Riis/Wikimedia Commons 10 of 34Inside an English family’s home on West 28th Street. 1889.Jacob Riis/Wikimedia Commons 11 of 34Lodgers rest in a crowded Bayard Street tenement that rents rooms for five cents a night and holds 12 people in a room just 13 feet long. Circa 1889-1890.Jacob Riis/Wikimedia Commons 12 of 34Guns, knives, clubs, brass knuckles, and other weapons, that had been confiscated from residents in a city lodging house. 1901.Jacob Riis/Museum of the City of New York/Getty Images 13 of 34An Italian rag picker sits inside her home on Jersey Street. Circa 1890.Jacob Riis/Wikimedia Commons 14 of 34Children attend class at the Essex Market school. 1887.Jacob Riis/Wikimedia Commons 15 of 34A man sorts through trash in a makeshift home under the 47th Street dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 16 of 34Members of the Growler Gang demonstrate how they steal. Circa 1888-1889.Jacob Riis/Wikimedia Commons 17 of 34Children stand in Mullen’s Alley. 1888.Jacob Riis/Wikimedia Commons 18 of 34"Women’s Lodging Rooms in West 47th Street." 1892.Jacob Riis/Wikimedia Commons 19 of 34Workers toil in a sweatshop inside a Ludlow Street tenement. Circa 1889.Jacob Riis/Library of Congress/Wikimedia Commons 20 of 34Inside a “dive” on Broome Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons 21 of 34"Street Arabs in Night Quarters." Mulberry Street. From How The Other Half Lives. Circa 1888-1890.Jacob Riis/Wikimedia Commons 22 of 34Lodgers sit on the floor of the Oak Street police station. Circa 1888-1898.Jacob Riis/Wikimedia Commons 23 of 34Rag pickers in Baxter Alley. Circa 1888-1890.Jacob Riis/Wikimedia Commons 24 of 34"In A Dive." 1895.Jacob Riis/Wikimedia Commons 25 of 34A shoemaker at work on Broome Street. 1888-1896.Jacob Riis/Wikimedia Commons 26 of 34"Police Station Lodgers in Elizabeth Street Station." Circa 1888-95.Jacob Riis/Wikimedia Commons 27 of 34Jewish immigrant children sit inside a Talmud school on Hester Street in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons 28 of 34A Bohemian family at work making cigars inside their tenement home. Circa 1890.Jacob Riis/Wikimedia Commons 29 of 34Residents gather in a tenement yard in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons 30 of 34Lodgers sit inside the Elizabeth Street police station. 1890.Jacob Riis/Wikimedia Commons 31 of 34Children sit inside a school building on West 52nd Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons 32 of 34A woman works in her attic on Hudson Street. 1897.Jacob Riis/Wikimedia Commons 33 of 34A man observes the sabbath in the coal cellar on Ludlow Street where he lives with his family. Circa 1887-1895.Jacob Riis/Wikimedia Commons 34 of 34Like this gallery?Share it:

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Heartbreaking Jacob Riis Photographs From How The Other Half Lives And Beyond View Gallery

Of the many photos said to have “changed the world,” there are those that simply haven’t (stunning though they may be), those that sort of have, and then those that truly have.

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1 of 34A young girl, holding a baby, sits in a doorway next to a garbage can. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 2 of 34An Italian immigrant man smokes a pipe in his makeshift home under the Rivington Street Dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 3 of 34Men stand in an alley known as “Bandit’s Roost.” Circa 1887-1890.Jacob Riis/Wikimedia Commons 4 of 34Street children sleep near a grate for warmth on Mulberry Street. Circa 1890-1895.Jacob Riis/Wikimedia Commons 5 of 34A boy and several men pause from their work inside a sweatshop. 1889.Jacob Riis/Library of Congress/Corbis/VCG via Getty Images 6 of 34Members of the infamous “Short Tail” gang sit under the pier at Jackson Street. Circa 1887-1889.Jacob Riis/Wikimedia Commons 7 of 34"Tramp in Mulberry Street Yard." Circa 1887-1888.Jacob Riis/Wikimedia Commons 8 of 34Two poor child laborers sleep inside the building belonging to the Sun newspaper, for which they worked as newsboys. 1892. Jacob Riis/Wikimedia Commons 9 of 34A squatter in the basement on Ludlow Street where he reportedly stayed for four years. Circa 1887-1890.Jacob Riis/Wikimedia Commons 10 of 34Inside an English family’s home on West 28th Street. 1889.Jacob Riis/Wikimedia Commons 11 of 34Lodgers rest in a crowded Bayard Street tenement that rents rooms for five cents a night and holds 12 people in a room just 13 feet long. Circa 1889-1890.Jacob Riis/Wikimedia Commons 12 of 34Guns, knives, clubs, brass knuckles, and other weapons, that had been confiscated from residents in a city lodging house. 1901.Jacob Riis/Museum of the City of New York/Getty Images 13 of 34An Italian rag picker sits inside her home on Jersey Street. Circa 1890.Jacob Riis/Wikimedia Commons 14 of 34Children attend class at the Essex Market school. 1887.Jacob Riis/Wikimedia Commons 15 of 34A man sorts through trash in a makeshift home under the 47th Street dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 16 of 34Members of the Growler Gang demonstrate how they steal. Circa 1888-1889.Jacob Riis/Wikimedia Commons 17 of 34Children stand in Mullen’s Alley. 1888.Jacob Riis/Wikimedia Commons 18 of 34"Women’s Lodging Rooms in West 47th Street." 1892.Jacob Riis/Wikimedia Commons 19 of 34Workers toil in a sweatshop inside a Ludlow Street tenement. Circa 1889.Jacob Riis/Library of Congress/Wikimedia Commons 20 of 34Inside a “dive” on Broome Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons 21 of 34"Street Arabs in Night Quarters." Mulberry Street. From How The Other Half Lives. Circa 1888-1890.Jacob Riis/Wikimedia Commons 22 of 34Lodgers sit on the floor of the Oak Street police station. Circa 1888-1898.Jacob Riis/Wikimedia Commons 23 of 34Rag pickers in Baxter Alley. Circa 1888-1890.Jacob Riis/Wikimedia Commons 24 of 34"In A Dive." 1895.Jacob Riis/Wikimedia Commons 25 of 34A shoemaker at work on Broome Street. 1888-1896.Jacob Riis/Wikimedia Commons 26 of 34"Police Station Lodgers in Elizabeth Street Station." Circa 1888-95.Jacob Riis/Wikimedia Commons 27 of 34Jewish immigrant children sit inside a Talmud school on Hester Street in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons 28 of 34A Bohemian family at work making cigars inside their tenement home. Circa 1890.Jacob Riis/Wikimedia Commons 29 of 34Residents gather in a tenement yard in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons 30 of 34Lodgers sit inside the Elizabeth Street police station. 1890.Jacob Riis/Wikimedia Commons 31 of 34Children sit inside a school building on West 52nd Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons 32 of 34A woman works in her attic on Hudson Street. 1897.Jacob Riis/Wikimedia Commons 33 of 34A man observes the sabbath in the coal cellar on Ludlow Street where he lives with his family. Circa 1887-1895.Jacob Riis/Wikimedia Commons 34 of 34Like this gallery?Share it:

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The Irish Land War, In 24 Heartbreaking Photographs

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Amazing Photographs Of The Summer Of 1969 In New York

1 of 34A young girl, holding a baby, sits in a doorway next to a garbage can. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 2 of 34An Italian immigrant man smokes a pipe in his makeshift home under the Rivington Street Dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 3 of 34Men stand in an alley known as “Bandit’s Roost.” Circa 1887-1890.Jacob Riis/Wikimedia Commons 4 of 34Street children sleep near a grate for warmth on Mulberry Street. Circa 1890-1895.Jacob Riis/Wikimedia Commons 5 of 34A boy and several men pause from their work inside a sweatshop. 1889.Jacob Riis/Library of Congress/Corbis/VCG via Getty Images 6 of 34Members of the infamous “Short Tail” gang sit under the pier at Jackson Street. Circa 1887-1889.Jacob Riis/Wikimedia Commons 7 of 34"Tramp in Mulberry Street Yard." Circa 1887-1888.Jacob Riis/Wikimedia Commons 8 of 34Two poor child laborers sleep inside the building belonging to the Sun newspaper, for which they worked as newsboys. 1892. Jacob Riis/Wikimedia Commons 9 of 34A squatter in the basement on Ludlow Street where he reportedly stayed for four years. Circa 1887-1890.Jacob Riis/Wikimedia Commons 10 of 34Inside an English family’s home on West 28th Street. 1889.Jacob Riis/Wikimedia Commons 11 of 34Lodgers rest in a crowded Bayard Street tenement that rents rooms for five cents a night and holds 12 people in a room just 13 feet long. Circa 1889-1890.Jacob Riis/Wikimedia Commons 12 of 34Guns, knives, clubs, brass knuckles, and other weapons, that had been confiscated from residents in a city lodging house. 1901.Jacob Riis/Museum of the City of New York/Getty Images 13 of 34An Italian rag picker sits inside her home on Jersey Street. Circa 1890.Jacob Riis/Wikimedia Commons 14 of 34Children attend class at the Essex Market school. 1887.Jacob Riis/Wikimedia Commons 15 of 34A man sorts through trash in a makeshift home under the 47th Street dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 16 of 34Members of the Growler Gang demonstrate how they steal. Circa 1888-1889.Jacob Riis/Wikimedia Commons 17 of 34Children stand in Mullen’s Alley. 1888.Jacob Riis/Wikimedia Commons 18 of 34"Women’s Lodging Rooms in West 47th Street." 1892.Jacob Riis/Wikimedia Commons 19 of 34Workers toil in a sweatshop inside a Ludlow Street tenement. Circa 1889.Jacob Riis/Library of Congress/Wikimedia Commons 20 of 34Inside a “dive” on Broome Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons 21 of 34"Street Arabs in Night Quarters." Mulberry Street. From How The Other Half Lives. Circa 1888-1890.Jacob Riis/Wikimedia Commons 22 of 34Lodgers sit on the floor of the Oak Street police station. Circa 1888-1898.Jacob Riis/Wikimedia Commons 23 of 34Rag pickers in Baxter Alley. Circa 1888-1890.Jacob Riis/Wikimedia Commons 24 of 34"In A Dive." 1895.Jacob Riis/Wikimedia Commons 25 of 34A shoemaker at work on Broome Street. 1888-1896.Jacob Riis/Wikimedia Commons 26 of 34"Police Station Lodgers in Elizabeth Street Station." Circa 1888-95.Jacob Riis/Wikimedia Commons 27 of 34Jewish immigrant children sit inside a Talmud school on Hester Street in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons 28 of 34A Bohemian family at work making cigars inside their tenement home. Circa 1890.Jacob Riis/Wikimedia Commons 29 of 34Residents gather in a tenement yard in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons 30 of 34Lodgers sit inside the Elizabeth Street police station. 1890.Jacob Riis/Wikimedia Commons 31 of 34Children sit inside a school building on West 52nd Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons 32 of 34A woman works in her attic on Hudson Street. 1897.Jacob Riis/Wikimedia Commons 33 of 34A man observes the sabbath in the coal cellar on Ludlow Street where he lives with his family. Circa 1887-1895.Jacob Riis/Wikimedia Commons 34 of 34Like this gallery?Share it:

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1 of 34A young girl, holding a baby, sits in a doorway next to a garbage can. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 2 of 34An Italian immigrant man smokes a pipe in his makeshift home under the Rivington Street Dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 3 of 34Men stand in an alley known as “Bandit’s Roost.” Circa 1887-1890.Jacob Riis/Wikimedia Commons 4 of 34Street children sleep near a grate for warmth on Mulberry Street. Circa 1890-1895.Jacob Riis/Wikimedia Commons 5 of 34A boy and several men pause from their work inside a sweatshop. 1889.Jacob Riis/Library of Congress/Corbis/VCG via Getty Images 6 of 34Members of the infamous “Short Tail” gang sit under the pier at Jackson Street. Circa 1887-1889.Jacob Riis/Wikimedia Commons 7 of 34"Tramp in Mulberry Street Yard." Circa 1887-1888.Jacob Riis/Wikimedia Commons 8 of 34Two poor child laborers sleep inside the building belonging to the Sun newspaper, for which they worked as newsboys. 1892. Jacob Riis/Wikimedia Commons 9 of 34A squatter in the basement on Ludlow Street where he reportedly stayed for four years. Circa 1887-1890.Jacob Riis/Wikimedia Commons 10 of 34Inside an English family’s home on West 28th Street. 1889.Jacob Riis/Wikimedia Commons 11 of 34Lodgers rest in a crowded Bayard Street tenement that rents rooms for five cents a night and holds 12 people in a room just 13 feet long. Circa 1889-1890.Jacob Riis/Wikimedia Commons 12 of 34Guns, knives, clubs, brass knuckles, and other weapons, that had been confiscated from residents in a city lodging house. 1901.Jacob Riis/Museum of the City of New York/Getty Images 13 of 34An Italian rag picker sits inside her home on Jersey Street. Circa 1890.Jacob Riis/Wikimedia Commons 14 of 34Children attend class at the Essex Market school. 1887.Jacob Riis/Wikimedia Commons 15 of 34A man sorts through trash in a makeshift home under the 47th Street dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images 16 of 34Members of the Growler Gang demonstrate how they steal. Circa 1888-1889.Jacob Riis/Wikimedia Commons 17 of 34Children stand in Mullen’s Alley. 1888.Jacob Riis/Wikimedia Commons 18 of 34"Women’s Lodging Rooms in West 47th Street." 1892.Jacob Riis/Wikimedia Commons 19 of 34Workers toil in a sweatshop inside a Ludlow Street tenement. Circa 1889.Jacob Riis/Library of Congress/Wikimedia Commons 20 of 34Inside a “dive” on Broome Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons 21 of 34"Street Arabs in Night Quarters." Mulberry Street. From How The Other Half Lives. Circa 1888-1890.Jacob Riis/Wikimedia Commons 22 of 34Lodgers sit on the floor of the Oak Street police station. Circa 1888-1898.Jacob Riis/Wikimedia Commons 23 of 34Rag pickers in Baxter Alley. Circa 1888-1890.Jacob Riis/Wikimedia Commons 24 of 34"In A Dive." 1895.Jacob Riis/Wikimedia Commons 25 of 34A shoemaker at work on Broome Street. 1888-1896.Jacob Riis/Wikimedia Commons 26 of 34"Police Station Lodgers in Elizabeth Street Station." Circa 1888-95.Jacob Riis/Wikimedia Commons 27 of 34Jewish immigrant children sit inside a Talmud school on Hester Street in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons 28 of 34A Bohemian family at work making cigars inside their tenement home. Circa 1890.Jacob Riis/Wikimedia Commons 29 of 34Residents gather in a tenement yard in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons 30 of 34Lodgers sit inside the Elizabeth Street police station. 1890.Jacob Riis/Wikimedia Commons 31 of 34Children sit inside a school building on West 52nd Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons 32 of 34A woman works in her attic on Hudson Street. 1897.Jacob Riis/Wikimedia Commons 33 of 34A man observes the sabbath in the coal cellar on Ludlow Street where he lives with his family. Circa 1887-1895.Jacob Riis/Wikimedia Commons 34 of 34Like this gallery?Share it:

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1 of 34A young girl, holding a baby, sits in a doorway next to a garbage can. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images

2 of 34An Italian immigrant man smokes a pipe in his makeshift home under the Rivington Street Dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images

3 of 34Men stand in an alley known as “Bandit’s Roost.” Circa 1887-1890.Jacob Riis/Wikimedia Commons

4 of 34Street children sleep near a grate for warmth on Mulberry Street. Circa 1890-1895.Jacob Riis/Wikimedia Commons

5 of 34A boy and several men pause from their work inside a sweatshop. 1889.Jacob Riis/Library of Congress/Corbis/VCG via Getty Images

6 of 34Members of the infamous “Short Tail” gang sit under the pier at Jackson Street. Circa 1887-1889.Jacob Riis/Wikimedia Commons

7 of 34"Tramp in Mulberry Street Yard." Circa 1887-1888.Jacob Riis/Wikimedia Commons

8 of 34Two poor child laborers sleep inside the building belonging to the Sun newspaper, for which they worked as newsboys. 1892. Jacob Riis/Wikimedia Commons

9 of 34A squatter in the basement on Ludlow Street where he reportedly stayed for four years. Circa 1887-1890.Jacob Riis/Wikimedia Commons

10 of 34Inside an English family’s home on West 28th Street. 1889.Jacob Riis/Wikimedia Commons

11 of 34Lodgers rest in a crowded Bayard Street tenement that rents rooms for five cents a night and holds 12 people in a room just 13 feet long. Circa 1889-1890.Jacob Riis/Wikimedia Commons

12 of 34Guns, knives, clubs, brass knuckles, and other weapons, that had been confiscated from residents in a city lodging house. 1901.Jacob Riis/Museum of the City of New York/Getty Images

13 of 34An Italian rag picker sits inside her home on Jersey Street. Circa 1890.Jacob Riis/Wikimedia Commons

14 of 34Children attend class at the Essex Market school. 1887.Jacob Riis/Wikimedia Commons

15 of 34A man sorts through trash in a makeshift home under the 47th Street dump. Circa 1890.Jacob Riis/Museum of the City of New York/Getty Images

16 of 34Members of the Growler Gang demonstrate how they steal. Circa 1888-1889.Jacob Riis/Wikimedia Commons

17 of 34Children stand in Mullen’s Alley. 1888.Jacob Riis/Wikimedia Commons

18 of 34"Women’s Lodging Rooms in West 47th Street." 1892.Jacob Riis/Wikimedia Commons

19 of 34Workers toil in a sweatshop inside a Ludlow Street tenement. Circa 1889.Jacob Riis/Library of Congress/Wikimedia Commons

20 of 34Inside a “dive” on Broome Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons

21 of 34"Street Arabs in Night Quarters." Mulberry Street. From How The Other Half Lives. Circa 1888-1890.Jacob Riis/Wikimedia Commons

22 of 34Lodgers sit on the floor of the Oak Street police station. Circa 1888-1898.Jacob Riis/Wikimedia Commons

23 of 34Rag pickers in Baxter Alley. Circa 1888-1890.Jacob Riis/Wikimedia Commons

24 of 34"In A Dive." 1895.Jacob Riis/Wikimedia Commons

25 of 34A shoemaker at work on Broome Street. 1888-1896.Jacob Riis/Wikimedia Commons

26 of 34"Police Station Lodgers in Elizabeth Street Station." Circa 1888-95.Jacob Riis/Wikimedia Commons

27 of 34Jewish immigrant children sit inside a Talmud school on Hester Street in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons

28 of 34A Bohemian family at work making cigars inside their tenement home. Circa 1890.Jacob Riis/Wikimedia Commons

29 of 34Residents gather in a tenement yard in this photo from How The Other Half Lives, published in 1890.Jacob Riis/Wikimedia Commons

30 of 34Lodgers sit inside the Elizabeth Street police station. 1890.Jacob Riis/Wikimedia Commons

31 of 34Children sit inside a school building on West 52nd Street. Circa 1888-1898.Jacob Riis/Wikimedia Commons

32 of 34A woman works in her attic on Hudson Street. 1897.Jacob Riis/Wikimedia Commons

33 of 34A man observes the sabbath in the coal cellar on Ludlow Street where he lives with his family. Circa 1887-1895.Jacob Riis/Wikimedia Commons

34 of 34Like this gallery?Share it:

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Heartbreaking Jacob Riis Photographs From How The Other Half Lives And Beyond View Gallery

Heartbreaking Jacob Riis Photographs From How The Other Half Lives And Beyond View Gallery

Heartbreaking Jacob Riis Photographs From How The Other Half Lives And Beyond View Gallery

Heartbreaking Jacob Riis Photographs From How The Other Half Lives And Beyond View Gallery

Heartbreaking Jacob Riis Photographs From How The Other Half Lives And Beyond

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The photos that sort of changed the world likely did so in as much as they made us all feel something. The photos that truly changed the world in a practical, measurable way did so because they made enough of us do something.

And few photos truly changed the world like those of Jacob Riis.

The New York City to which the poor young Jacob Riis immigrated from Denmark in 1870 was a city booming beyond belief. In the three decades leading up to his arrival, the city’s population, driven relentlessly upward by intense immigration, had more than tripled. Over the next three decades, it would nearly quadruple.

Unsurprisingly, the city couldn’t seamlessly take in so many new residents all at once. Equally unsurprisingly, those that were left on the fringes to fight for whatever scraps of a living they could were the city’s poor immigrants.

Confined to crowded, disease-ridden neighborhoods filled with ramshackle tenements that might house 12 adults in a room that was 13 feet across, New York’s immigrant poor lived a life of struggle — but a struggle confined to the slums and thus hidden from the wider public eye.

Jacob Riis changed all that. Working as a police reporter for the New-York Tribune and unsatisfied with the extent to which he could capture the city’s slums with words, Riis eventually found that photography was the tool he needed.

Starting in the 1880s, Riis ventured into the New York that few were paying attention to and documented its harsh realities for all to see. By 1890, he was able to publish his historic photo collection whose title perfectly captured just how revelatory his work would prove to be: How the Other Half Lives.

A startling look at a world hard to fathom for those not doomed to it, How the Other Half Lives featured photos of New York’s immigrant poor and the tenements, sweatshops, streets, docks, dumps, and factories that they called home in stark detail.

And as arresting as these images were, their true legacy doesn’t lie in their aesthetic power or their documentary value, but instead in their ability to actually effect change.

“I have read your book, and I have come to help,” then-New York Police Commissioners board member Theodore Roosevelt famously told Riis in 1894. And Roosevelt was true to his word.

Though not the only official to take up the cause that Jacob Riis had brought to light, Roosevelt was especially active in addressing the treatment of the poor. As a city official and later as state governor and vice president of the nation, Roosevelt had some of New York’s worst tenements torn down and created a commission to ensure that ones that unlivable would not be built again.

With this new government department in place as well as Jacob Riis and his band of citizen reformers pitching in, new construction went up, streets were cleaned, windows were carved into existing buildings, parks and playgrounds were created, substandard homeless shelters were shuttered, and on and on and on.

While New York’s tenement problem certainly didn’t end there and while we can’t attribute all of the reforms above to Jacob Riis and How the Other Half Lives, few works of photography have had such a clear-cut impact on the world. It’s little surprise that Roosevelt once said that he was tempted to call Riis “the best American I ever knew.”

For more Jacob Riis photographs from the era of How the Other Half Lives, see this visual survey of the Five Points gangs. Then, see what life was like inside the slums inhabited by New York’s immigrants around the turn of the 20th century.